Chain watch



FIG. 1 is a top perspective view of a chain watch;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is an enlarged sectional view of a link of the chain watch shownseparately for completeness of illustration.

The broken lines shown in the drawings illustrate portions of the chainwatch that form no part of the claimed design.

CLAIM The ornamental design for a chain watch, as shown and described.